Joseph hodgson



UNITED STATES PATENT i, OFFIc-E.

JOSEPH HODGSON, OF sAN FRANCISCO, CALIFORNIA.

com'.`r

SPECIFICATION forming part of Letters Patent No. 534.331, dated February 19, 1895. Application filed February 5,1894. SerialNo. 499,220. (No model.)l

Toa/ZZ whom t may concern.'

Be it known that I, JOSEPH HOpGSON, a citizen of the United States, residing at San- Francisco, in the county of San Francisco and State of California, haveinvented a new and useful Improvement in Bolts, of whichthe following is a full, clear, and exact description of said invention, which will enable others skilled in the art to .which it appertains tov make, use, and practice the same. My invention relates to a novel way-ot' making bolts and the manner of constructing the, head of same and it consists, first, of a cylin- -dricalshell threaded on its outerand inner side; secondly, of a partly conical .rod placed within said shell and provided with threads cnt thereon to correspond with the inner threads of the shell.

The object of my invention is to provide a convenient means whereby one or more pieces can be bolted together from one side and will be found particularly desirable for temporary repairs in damaged vessels or boilers, &o.

Referring to the drawings forming a part of this application, Figure (l) represents an edge view of two planks cut away and fastened togetherwith my improved bolt. Fig. (2) is a vertical sectional view ot Fig. (l) taken from line 1 to 1."

Similar letters of reference are used to de- 1 note corresponding parts throughout the en- Vss and a. the ordinary tire specification and both viewsof the drawings.

Let A represent the cylindrical shell par? 'tially threaded upon its outer and inner side nut `corresponding with the outer threads. The rear end of said cylin-V drical shell is notched or d enticulated as at B clear around its circumference in such manner as tolmake this part of the shell flexible.`

The rod C, working within the shell A is partly provided with/threads cut thereon corresponding with the female thgeads of the shell. The rear end of said rod is conical as iat b and the diameter at-the edge of thecone must bemade equalv to the diameter of the shell while the fore end may be made square to facilitate the turning of the rod when in operation with a key or other mechanical means.

To carry my. invention into practice I screw through. the shell A the rod C until its'coni cal rear end reachesthe denticul'ated edge of ,y

the shell. I then bore through the wall D a `substantially as set hole corresponding to the diameter of the shell A through which the shell is being pushed until the denticulated edge is nearly out of the wall. I then screw forward the rod C with a keyor other nieans. While the conicalpart of the rod is'being carriedforward the inner side ofthe flexible or denticulated edge of the shellwill be forced to spread out` thereby enlarging the diameter of the shell and preventing the sameufrom slipping out. Thus my bolt isl ready to receive the patch plank d bored also according' to the diameter of the shell A andas soon as'the patch plank is adapted to form a removable head at its rear` end; a spreading device consisting ofy a rod working within said shell and provided with threads at one end corresponding with the inner threads of the shell, said rod. terminating in a cone-shape at the other end and means to screw and unscrew said rod for the purpose of forming the removable head as set 2. The heroin described bolt consisting of a cylindrical shell provided with outer and inner threads and denticulated rear end, in combination with a rod 'working within said shell having at one end threads cut thereon corresponding with the inner threads of the shell, and a cone shape at the other adapted to spread out the denticulated end of the shell, substantially as set forth.

' 3. A bolt for the purpose described consist ing of a cylindrical-shell provided with outer and inner threads and a flexible end in combination with a conical rod partly threaded to correspond with the inner thread of the shell forth.

Witnesses:

I F. ALLEYNEORR,

A. S. PAE.

ICO

JosEBHfHODGsO'N.- I 

